A petroleum liquid has a flash point of 85°F. This is a grade （）.
Petroleum is a result of the（）of plant or animal matter in areas which are slowly subsiding.
The volatility of a liquid is the tendency of a liquid to （）.
Access to a cargo pumproom on a tanker carrying grades A，B，C or D liquid cargoes shall be（）.
A fluid coil will （）large quantities of heat when it changes state from a liquid to a vapor.
Before welding can be done in a tank that has carried petroleum products，a certificate must be obtained from（）.
The most likely location for a liquid cargo fire to occur on a tanker would be（）.
Movement of liquid in a tank when a vessel inclines causes an increase in（）.
What is the principal danger from the liquid in a half full tank onboard a vessel?（）
What will NOT increase friction of a liquid flowing in a pipe and cause a loss of suction head?（）.
A petroleum liquid has a flash point of 135°Fahrenheit. This liquid is classed as a grade （）.
Before welding in a tank that has carried petroleum products，the tank must be certified by （）.
Petroleum cargo tanks should not be topped off at deck level when loading on a cold day because（）.
Which of the petroleum products listed has the lowest flash point?（）
“Flooding back” is a condition where the liquid refrigerant （）.
What is the substance called which can readily be converted from a liquid into a vapor, and also from a vapor into liquid with a reasonably narrow range of pressure?（）
The heat used to change a liquid to a vapor is called （）.
A fluid coil will （） large quantifies of heat when it changes state from a liquid to a vapor.
The flash point of a liquid refers to the temperature （）
A pressure drop in the liquid line of a refrigeration system may cause（）
In his liquidity preference framework, Keynes assumed that money has a zero rate of return; thus, when interest rates _________ the expected return on money falls relative to the expected return on bonds, causing the demand for money to _________.
A firm has a production function f （x,y)=1:10（x0.20 + y0.20)5 whenever x ＞ 0 and y ＞ 0.
Before petroleum______, another way has to be found.
Passage 1Its one of our common beliefs that mice are afraid of cats. Scientists have long known that even if a mouse has never seen a cat before, it is still able to detect chemical signals released f
